Electronic reader device and graphical user interface control method thereof

ABSTRACT

An electronic reader device with a physical control disposed on a surface of the device housing. The physical control is operable to initiate a first function. A display disposed on the surface of the housing is operable to show a virtual control that initiates a second function. A sensor detects a drag operation moving the virtual control to a position on a border of the display adjacent to the physical control. A processor associates the second function with the physical control in response to the drag operation and performs the second function upon activation of the physical control.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. application Ser. No.12/732,213, entitled “ELECTRONIC READER DEVICE AND GRAPHICAL USERINTERFACE CONTROL METHOD THEREOF”, filed on Mar. 26, 2010, published asUS20110181603A1, which is based upon and claims the benefit of priorityfrom Chinese Patent Application No. 201010300624.7, filed on Jan. 23,2010 in the People's Republic of China. The entirety of each of theabove-mentioned patent applications is hereby incorporated by referenceherein in its entirety.

BACKGROUND

1. Technical Field

The disclosure relates to computer technologies, and more particularlyto an electronic reader device and flexible control interface thereof.

2. Description of Related Art

Digitally formatted books are widely known as e-books. Current e-bookreader devices often feature a reflective display, and offer freewireless access to Internet bookstores. One appealing factor of thee-book reader device is the capability of carrying numerous digitallyformatted books in a small unit. Being designed for reading, a majorsurface area of an e-book reader is reserved for a display whilephysical controls, such as keys or a keyboard, surround the display.Among the physical controls, a functional key activates a specificfunction, such as returning to a main menu, launching an e-mailapplication, connecting to a bookstore and others. Although functionalkeys are designed for convenience of executing certain common tasks, themost frequently executed key can vary by users. An icon or symbol may beprinted on a functional key to denote the function correspondingthereto. Since such prints are fixed to the surface of an e-book reader,changing functionality of the key can lead to confusion.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of an exemplary embodiment of an electronicreader device;

FIG. 2 is a top view of an exemplary embodiment of the electronic readerdevice;

FIG. 3A is a cross-section of an exemplary embodiment of a physicalcontrol module;

FIGS. 3B-3F are schematic diagrams of respective layers of the exemplaryembodiment of the physical control module;

FIG. 3G is an alternative embodiment of the second layer of the physicalcontrol module;

FIG. 4 is a schematic diagram showing exemplary drag operations oficons;

FIG. 5 is a flowchart of an exemplary embodiment of a graphical userinterface (GUI) control method;

FIG. 6 is a flowchart of an exemplary embodiment of operating pointactivation of the physical control module;

FIGS. 7-9 are schematic diagrams of exemplary embodiments of theelectronic reader device with different icons shown on the physicalcontrol module;

FIG. 10 is a schematic diagram of an alternative embodiment of theelectronic reader device with light-based touch sensors;

FIG. 11 is a schematic diagram of an alternative embodiment of theelectronic reader device with physical controls structured as keys; and

FIG. 12 is a cross-section of a key in one alternative embodiment of thephysical control.

DETAILED DESCRIPTION

Description of exemplary embodiments of the electronic reader device andelectronic reader device is given in the following paragraphs which areorganized as:

-   1. System Overview

1.1 Exemplary Reader Device

1.2 Structure of a physical control

-   2. GUI control method

2.1 Icon behaviors

2.2 Exemplary operation

-   3. Alternative embodiments

3.1 Alternative configuration of touch sensors

3.2 Additional contact operations

-   4. Conclusion

1. System Overview

The disclosed electronic reader device can be implemented as astandalone device or integrated in various electronic devices, such as acell phone, a tablet personal computer (PC), a laptop computer, amonitor, a multimedia player, a digital camera, a set top box, apersonal digital assistant (PDA), a navigation device or a mobileinternet device (MID).

1.1 Exemplary Reader Device

With reference to FIG. 1, a processor 151 comprises a central processingunit of the electronic reader device 100. The processor 151 may comprisevarious integrated circuits (ICs) for processing data andmachine-readable instructions. A communication unit 156 establisheswireless communication channels through which the electronic readerdevice 100 may connect to and download e-books from a virtual bookstore.The communication unit 156 may comprise antennas, base band and radiofrequency (RF) chipsets for wireless local area network communicationand/or cellular communication such as wideband code division multipleaccess (W-CDMA) and high speed downlink packet access (HSDPA). Theprocessor 151 may be packaged as a chip or comprise a plurality of chipsinterconnected through buses. For example, the processor 10 may onlycomprise a central processing unit (CPU) or a combination of a CPU, adigital signal processor (DSP), and a chip of a communicationcontroller, such as a chip of the communication unit 156. Thecommunication controller may comprise a controller of a cellularcommunication, infrared, BLUETOOTH, or wireless local area network (LAN)communication devices. The communication controller coordinatescommunication among components of the electronic device 100 orcommunication between the electronic device 100 and external devices.

A power supply 158 provides electrical power to components of theelectronic reader device 100. A crystal oscillator 159 provides clocksignals to the processor 151 and other components of the electronicreader device 100. Connection of the components in the electronic readerdevice 100 is shown in FIG. 1 and may comprise serial or paralleltransmission buses. Input and output (I/O) units 160 may comprisecontrol buttons, an alphanumeric keypad, a touch panel, a touch screen,and a plurality of light emitting diodes (LEDs). A controller 165detects operations on the I/O units 160 and transmits signals indicativeof the detected operation to the processor 151. The controller 165 alsocontrols operations of the I/O units 160. The processor 151 may controlthe I/O units 160 through the controller 165. Ports 164 may be used toconnect to various computerized interfaces, such as an externalcomputer, or a peripheral device. The ports 164 may comprise physicalports complying with universal serial bus (USB) and IEEE 1394 standards.

Nonvolatile memory 153 stores an operating system and applicationsexecutable by the processor 151. The processor 151 may load runtimeprocesses and data from the nonvolatile memory 153 to the main memory152 and store digital content in a mass storage device 154. Theelectronic reader device 100 may obtain digital content such as e-booksfrom the communication unit 156. The main memory 152 may comprise arandom access memory (RAM), such as static RAM (SRAM) or dynamic RAM(DRAM). The nonvolatile memory 153 may comprise an electrically erasableprogrammable read-only memory (EEPROM) or a flash memory, such as a NORflash or a NAND flash.

An audio output unit comprises a digital to analog converter convertingaudio signals output by the processor 151 from digital format to analogformat.

A display 155 is operable to display text and images, and may comprise areflective display, such as an electrophoretic display, anelectrofluitic display, or a display using interferometric modulation.Alternatively, the display 155 may comprise e-paper, a display made upof organic light emitting diodes (OLEDs), a field emission display(FED), or a liquid crystal display (LCD). The display 155 may displayvarious graphical user interfaces (GUIs) as virtual controls includingbut not limited to windows, scroll bars, icons, and clipboards. Thedisplay 155 may comprise a single display or a plurality of displays indifferent sizes. The processor 151 may present various GUIs on thedisplay 155 as detailed in the following paragraphs.

The electronic reader device 100 comprises a housing structured toinclude the components of the electronic reader device 100.

The I/O units 160 comprise a touch sensor 167 operable to detect contactoperations on the display 155. The touch sensor 167 may comprise atransparent touch pad overlaid on the display 155 or arrays of opticaltouch transmitters and receivers located on the boarder of the display155, such as those disclosed in US patent publication No. 20090189878.

With reference to FIG. 2, the electronic reader device 100 comprises ashell 166 providing the housing in which the components of theelectronic reader device 100 are integrated. Physical controls of theI/O units 160 comprise a control module 60, a touch pad 61, and a key62, forming a portion of the frame of the display 155. The touch pad 61is operable to turn pages of an e-book. The key 62 is operable to show amenu on the display 155. The control module 60 comprises activationpoints, each of which is operable to trigger an operation associatedwith the activation point upon receiving depression thereon. Each of theactivation points may initially associate with a default operation. Thedisplay 155, control module 60, a touch pad 61, and a key 62 aredisposed on a first surface and form a portion of the shell 166 of theelectronic reader device 100.

1.2 Structure of a Physical Control

FIG. 3A is a cross-section of the physical control module 60 along aline 70 in FIG. 2. The control module 60 comprises layers L1˜L5. Withreference to FIGS. 3A and 3B, the layer L1 forms top cover of thecontrol module 60 with an array of transparent windows, among whichwindows 1˜9 are shown in FIG. 3A. Windows in addition to 1˜9 are shownas similar squares in FIGS. 3B-3D without labels. Windows on the layerL2 are aligned with windows on the layer L1, windows on the layer L3 arealigned with windows on the layer L2, and are aligned with the lamps onthe layer L4. FIG. 3F shows lamps in the layer L4 as similar circles,among which lamps 11-19 are shown in FIG. 3A. The windows on layersL1-L3 may be filled with transparent dielectric materials, such thatlamps in the layer L4 may provide light beams through the windows.

FIG. 3C shows the upper surface of the layer L2. The layer L2 comprisesa printed circuit board (PCB) on which three printed metallic areas81-83 (in FIG. 3C) are formed, each of which acts as a detection pad.Each of the detection pads 81-83 comprises an array of openings to forma plurality of windows thereon. Vias 91, 92, and 93 in the layer L2represented by round points in FIG. 3C are respectively formed bycenters of the detection pads 81-83 and are filled with conductivematerial such as tin. Buses 811, 821, and 831 connected to the detectionpads 81-83 are formed on the lower surface of the layer L2, and thusrepresented by dotted lines in FIG. 3C.

With reference to FIG. 3D, the buses 811, 821, and 831 of the detectionpads 81-83 are formed on the lower surface of the layer L2 and connectedto the detection pads 81-83 respectively through the vias 91, 92, and93. Each of the buses 811, 821, and 831 has one end connected to one ofthe detection pads 81-83 and the other end connected to the controller165. The controller 165 detects contact operations in proximity to anoperating point of the control 60 by determining capacitance changes ofat least one of the detection pads 81-83. Alternatively, the controller165 may detect contact operations in proximity to an operating point ofthe control 60 by determining changes in thermal or biologicalparameters through at least one of the detection pads 81-83.

With reference to FIG. 3E, the layer L3 comprises a dielectric layer,such as another layer of printed circuit board, on which an array ofwindows are formed and aligned with the windows on the layer L2. In FIG.3F, lamps in the layer L4 are formed as lamp arrays on the upper surfaceof the layer L5 and aligned with the windows on the layer L3. The lampson the layer L5 may comprise LEDs or OLEDs. Buses connecting the lampsare also formed on the layer L5. Distance between any two of thedetection pads exceeds the thickness of the layer L1. The layers L2 andL5 may comprise printed circuit boards.

Note that more detection pads may be formed on the layer L2. Anoperating point of the control 60 may associate with a group ofdetection pads. For example, FIG. 3G shows another embodiment of thelayer L2 wherein components such as vias and traces are representedanalogously with respect to FIG. 3C. An operating point of the control60 is associated with three detection pads, in which a central detectionpad (such as 81) and a left detection pad (such as 81 a) and a rightdetection pad (such as 81 b) thereof are connected to the controller 165through corresponding vias and traces. As more than one detection padare grouped up to correspond to a single operating point on the control60, the controller 165 may detect moving direction of a contactoperation on an operating point by determining the order of detectionpad activation in a detection pad group.

2. GUI Control Method

The electronic reader device 100 may provide a plurality of functionsand display icons respectively corresponding to the plurality offunctions.

2.1 Icon Behavior

Status of an icon may notify events received or generated by the programassociated with the icon. The processor 151 may update icon status shownby the lamps of the control 60 to synchronize with program events orstatus associated with the icon when the display 155 shows anotherforeground program or is turned off.

Status of an icon may comprise at least three states, such as on, off,and animation states. The on state of an icon may comprise a pluralityof sub-states respectively representing statuses of the programfunctions associated with the icon. For example, the sub-states mayrepresent function execution/suspension, service signing in/off,communication channel connection/disconnection, and others. The off iconstate indicates that the device 100 is in suspension mode. The animationstate of an icon indicates message delivery from a function or programassociated with the icon.

With reference to FIG. 2, icons 41-45 respectively correspond tofunctions of returning to a main page, showing a favorite collectionfolder (typically referred to as “My Favorite”), launching a musicplayer program, a really simple syndication (RSS) reader, and anInternet messaging application. Icons 431-435 respectively correspond tooptional functions of the music player program associated with the icon43. The icon 431 corresponds to resumption or suspension of musicplayback. The icons 432 and 433 respectively correspond to backward andforward playback switching. The icon 434 corresponds to showing a GUI ofinformation query. The icon 435 corresponds to showing a GUI of musicplayer configurations. When detecting a touch condition to activate anicon shown in FIG. 2, the processor 155 performs a functioncorresponding to the activated icon.

With reference to FIG. 4, areas 51-53 on the control 60 are respectivelyin proximity to the detection pads 81-83. Each of the areas 51-53 servesas an operating point of the control 60 which when activated triggersthe electronic reader device 100 to perform one or more functionsassociated with the operating point. Upon detecting contact, thecontroller 165 may interpret the contact operation on one operatingpoint as activation operation of the operating point. As each of theareas 51-53 may initially be associated with no function, lamps in theareas 51-53 may correspondingly be initially off and showing any iconicimage.

2.2 Exemplary Operation

With reference to FIG. 5, the processor 151 detects two eventscomprising a drag operation that moves an icon to a position on a borderof the display 155 close to an operating point of the physical control60 (step S2) and an activation of the operating point of the physicalcontrol 60 immediately following the drag operation (step S4). The dragoperation may begin from an original position of the icon to a point ina proximity range to one of the operating points, such as one of theareas 51-53, thus to generate the detected events in steps S2 and S4.The processor 151 adds the icon to a reserved area in the main memory152 (step S6), associates the icon and one or more functionscorresponding to the icon with the operating point (step S8) andswitches on a portion of lamps in the area of the operating point toshow an iconic image representing the icon on the operating point inresponse to steps S2 and S4 (step S10). If the operating point has anoriginal association with a default function of a default icon beforestep S2, the processor 151 replaces the original association of theoperating point and the default function by the association generated instep S8. The processor 151 may represent the association by data storedin the main memory 152 or the nonvolatile memory 153. The processor 151may determine that the activation of the operating point immediatelyfollows the drag operation if occurrence of the operating pointactivation in step S4 is no later than a predetermined period D from thetime when an end point of the drag operation on the display 155 isdetected in step S2. The processor 151 presents the iconic image as acopy of the icon, and may not remove the icon from the display 155 afterthe drag operation. With reference to FIG. 6, when receiving activationof the operating point (step S12), the processor 151 interprets theactivation of the operating point as an activation to an icon associatedwith the operating point (step S14) and performs the one or morefunctions currently associated with the icon and the operating point(step S16). Note that in step S12, the activation of the operating pointdoes not immediately follow any special drag operation. The processor151 updates the iconic image on the activated operating point tosynchronize the appearance of the image with the icon associated withthe operating point.

The processor 151 may determine the drag operation of the icon as aspecial drag operation if the end point of the drag operation on thedisplay border is in a proximity range to or close to an operatingpoint. The processor 151 may execute steps S6, S8, and S10 in responseto the special drag operation.

With reference to FIG. 4, for example, when detecting a first dragoperation 201 that moves the icon 431 to a position P1 on a border ofthe display 155 close to the operating point of the area 51 (step S2)and an activation of the operating point of the area 51 following thefirst drag operation (step S4), the processor 151 adds the icon 431 to areserved area in the main memory 152 (step S6), associates musicplayback resumption and suspension functions of the icon 431 with theoperating point of the area 51 to establish a first association thereof(step S8) and switches on a portion of lamps in the area 51 to show aniconic image 301 representing the icon 431 in response to the detection(step S10), as shown in FIG. 7. When receiving activation of theoperating point of the area 51 (step S12), the processor 151 accordingto the first association interprets the activation of the operatingpoint as an activation to the icon 431 associated with the operatingpoint (step S14) and performs the music playback resumption functionassociated with the operating point (step S16). The icon 431 may changeappearance according to the performed one or more functions. Theprocessor 151 may control the lamps in the area 51 to synchronizeappearance of the iconic image 301 with the icon 431. As shown in FIG.8, for example, after step S14, appearances of the icon 431 and theimage in the area 51 synchronously change to represent the suspensionfunction.

Data representing association of an operating point, an icon, and one ormore functions thereof, such as the operating point of the area 51, theicon 431, and music playback resumption and suspension functions of theicon 431, may comprise identification information of each of theassociated operating point, icon, and one or more functions in theassociation.

Additionally, the processor 151 may smoothly display movement of theicon 431 along a track of the drag operation 201 in step S2, and whenthe drag operation reaches the position P1, keeps on movement of theicon 431 according to the moving speed and direction of the icon 431 onthe position P1 for the predetermined period D.

Further, when detecting a second drag operation 202 that moves the icon432 to a position P2 on a border of the display 155 adjacent to theoperating point of the area 51 (step S2) and an activation of theoperating point of the area 51 following the second drag operation (stepS4), the processor 151 adds the icon 432 to a reserved area in the mainmemory 152 (step S6), associates backward music playback switch functionof the icon 432 with the operating point of the area 51 to establish asecond association of thereof (step S8) and switches on a portion oflamps in the area 51 to show an iconic image 302 (shown in FIG. 9)representing the icon 432 rather than performing the music playbacksuspension function (step S10). The processor 151 replaces the firstassociation between the operating point 51 and the icon 431 by thesecond association between the operating point 51 and the icon 432. Whenreceiving activation of the operating point of the area 51 (step S12),the processor 151 interprets the activation of the operating point as anactivation to the icon 432 associated with the operating point of thearea 51 (step S14) and performs the backward music playback switchfunction associated with the operating point according to the secondassociation (step S16).

3. Alternative Embodiments 3.1 Alternative Configuration of TouchSensors

Light guide components, such as optical fibers, may be respectivelyutilized to connect each lamp to a corresponding window on a detectionpad, thus to eliminate interference between the lamps and the detectionpads. The dimension of each window on the control 60 may as small as across-section area of an optical fiber. Alternatively, as one end of anoptical fiber is connected to a window on the control 60, the other endof an optical fiber may be connected to one or more pixel of the display155. Thus, an area of the display 155 comprising the fiber-connectedpixels is reserved for the functions of the physical control 60.

With reference to FIG. 10, infra-red LEDs and photodiode (PD) receiversdisclosed in US patent publication No. 20090189878 may be utilized bythe device 100. Infra-red LEDs are represented by similar circles withstripes, and PD receivers are represented by similar circles withoutstripes. Infra-red LEDs 600 are arranged as a vertical array adjacent toleft edge of the display 155, and PD receivers 500 operable to receivelight beams transmitted by the LEDs 600 are arranged as a vertical arrayadjacent to right edge of the control 60. Infra-red LEDs 610 arearranged as a horizontal array adjacent to lower edge of the display 155and the control 160, and PD receivers 510 operable to receive lightbeams transmitted by the LEDs 610 are arranged as a horizontal arrayadjacent to upper edge of the display 155 and the control 160. Theprocessor 151 may utilize the LEDs 600, 610 and PD receivers 500, and510 to detect contact operations in an area enclosed by these LEDs andPD receivers. The infra-red LEDs and PD receivers may be fixed to aninner surface of the shell 166.

With reference to FIG. 11, the operating points of the control 60 may bestructured as keys in areas 51-54. Each of the operating points isactivated by contact. FIG. 12 shows a cross-section of a key in the area53 along a line 71. Similar or identical components between FIGS. 12 and3A are labeled with the same numbers. A top cover L1 of the keycomprises a plurality of transparent windows including 1-9 through whichlamps including 11-19 may provide illumination. The lamps including11-19 of the key are formed on PCB L5 and connected to the controller165 through a flexible bus 705. The bus 705 may comprise a flexibleprinted circuit board. A cushion 700 of the key is made up of elasticmaterial, on which a pad 701 is made up of electrically conductivematerial. Labels 702 and 703 denote two terminals of wires printed onPCB 704. The pad 701 may connect the terminals 702 and 703 when the keyis depressed. The processor 151 may detect if the key is depressed bydetermining if the terminals 702 and 703 are connected.

3.2 Additional Contact Operations

The iconic images shown on the control 60 may also be referred to asicons. The processor 151 may respond to various contact operations on anoperating point based on a status of an icon associated with theoperating point.

In response to a drag operation applied to an icon in “on” state from anoperating point of the control 60 to the functional display 155, theprocessor 151 removes the association between the operating point and aprogram of the icon and further disables presentation of the icon on thecontrol 60. Removal of the association between the operating point andthe program also cancels association of the operating point, the icon,and operations of the program. In response to a contact operationapplied to an icon in “on” state, the processor 151 executes a functionrepresented by the icon. In response to a depress and hold operationapplied to the icon in “on” status, the processor 151 brings the programassociated with the icon to the foreground of the display 155. Thedepress and hold operation comprises contact with the operating pointassociated with the icon for a predetermined period of time.

In a suspension mode of the device 100, the processor 151 may enter apower saving state while the control 60 and at least a related ICthereof (such as the controller 165) still works in a normal operationmode. In response to a contact operation on any icon in off state, theIC related to the control 60 interrupts the processor 151, and theprocessor 151 changes operation mode of the device 100 and restores allicons on the control 60 to “on” or “animation” state.

In response to event or message notification from a program, theprocessor 151 changes status of an icon displayed on an operating pointof the control 60 associated with the program from an original state toan animation state. In response to a contact operation applied to anicon in “animation” state on the control 60, the processor 151 prompts aGUI element showing a message of a program associated with the icon.

In response to a drag operation applied to an icon in “animation” statefrom the control 60 to the display 155, the processor 151 brings theprogram associated with the icon to the foreground of the display 155for further operations.

In response to a drag operation applied to an icon in “animation” statusfrom the control 60 to the border thereof, the processor 151 cancelsmessage notification from the program associated with the icon andrestores status of the icon to an original status thereof.

4. Conclusion

As previously described, the electronic reader device 100 allowstransition of icons between display 155 and a physical control forming aportion of the frame of the display 155. Each operating point of thephysical control may serve as a functional key and is configurable totrigger various functions. The physical control has no printed icon,thus providing more user-definable features.

It is to be understood, however, that even though numerouscharacteristics and advantages of the disclosure have been set forth inthe foregoing description, together with details of the structure andfunction of the present disclosure, the disclosure is illustrative only,and changes may be made in detail, especially in matters of shape, size,and arrangement of parts within the principles of the present disclosureto the full extent indicated by the broad general meaning of the termsin which the appended claims are expressed.

1. An electronic device, comprising: a housing; a physical controllocated on a surface of the housing and operable to initiate a firstfunction in response to activation of the physical control, andcomprises: a circuit board comprising two disconnected electricalterminals; a push button switch located on the circuit board, andelectrically conducting the two disconnected electrical terminals inresponse to activation of the push button switch; a touch sensitive unitlocated on the push button switch, and operable to detect a touchoperation on the touch sensitive unit; and a controller electricallyconnected to the touch sensitive unit through a bus, and operable todetect the touch operation through the touch sensitive unit.
 2. Theelectronic device as claimed in claim 1, wherein the touch sensitiveunit comprises: one or more infrared light emitting diodes operable totransmit light; and one or more infrared light receiver operable toreceive the light transmitted by the one or more infrared light emittingdiodes.
 3. The electronic device as claimed in claim 1, wherein thetouch sensitive unit comprises: a first detection pad comprising a metalpad located on the push button switch, and operable to detect a firsttouch operation on the first detection pad; and a upper cover structurelocated on the first detection pad; wherein the controller iselectrically connected to the first detection pad through the bus, andoperable to detect the touch operation through the first detection pad.4. The electronic device as claimed in claim 3, wherein the upper coverstructure comprises dielectric materials.
 5. The electronic device asclaimed in claim 4, wherein the push button switch comprises a firstspace for operation of the push button switch between the firstdetection pad and the two electrical terminals.
 6. The electronic deviceas claimed in claim 4, wherein a second space is positioned between thefirst detection pad and the push button switch.
 7. The electronic deviceas claimed in claim 3, wherein the touch sensitive unit comprises: asecond detection pad comprising a metal pad located under the uppercover structure over the push button switch and besides the firstdetection pad, and operable to detect a second touch operation on thesecond detection pad; wherein the controller is electrically connectedto the first detection pad and the second detection pad through the bus,and operable to detect a direction of the first touch operation and thesecond touch operation based on an order in which the first detectionpad and the second detection pad detect the first touch operation andthe second touch operation, respectively.
 8. An electronic device,comprising: a push button switch comprising two disconnected electricalterminals, and electrically conducting the two disconnected electricalterminals in response to activation of the push button switch; a firstdetection pad comprising a metal pad located on the push button switch,and operable to detect a first touch operation on the first detectionpad; and a upper layer structure located on the first detection pad; anda controller electrically connected to the first detection pad through abus, and operable to detect the first touch operation through the firstdetection pad touch.
 9. The electronic device as claimed in claim 8,wherein the touch sensitive unit comprises: a second detection padcomprising a metal pad located under the upper layer structure over thepush button switch and besides the first detection pad, operable todetect a second touch operation on the second detection pad; wherein thecontroller is electrically connected to the first detection pad and thesecond detection pad through the bus, and operable to detect a directionof the first touch operation and the second touch operation based on anorder in which the first detection pad and the second detection paddetect the first touch operation and the second touch operation,respectively.
 10. The electronic device as claimed in claim 3, whereinthe upper cover structure comprises dielectric materials.